Syntheses and properties of associative acrylamide copolymers containing short hydrophobic chains used in a friction reducer for slick-water fracturing  

作　　者：Ya-Xing Dai Xian-Li Zhang Si-Yuan Liu Feng-Run-Ze Zhang Yi-Xi Zhang Yu-Tong Sang Jing-Xi Zheng Zhao-Sheng Liu Peng Zhang 

机构地区：[1]College of Chemistry and Chemical Engineering,Chongqing University of Science and Technology,Chongqing,401331,China [2]College of Ecology and Environment,Chongqing Resources and Environmental Protection of University,Chongqing,401331,China China [3]China Property Project Department of Dezhou,Mining Property Service Center,Shengli Oilfield Company of Sinopec,Dezhou,253000,Shandong,China

出　　处：《Petroleum Science》2024年第3期1889-1901,共13页石油科学（英文版）

基　　金：supported by the National Natural Science Foundation of China(Project Nos.51774062 and 52274032);Scientific and Technological Key Research Program of Chongqing Municipal Education Commission(KJZD-K201901502);General Project of Chongqing Natural Science Foundation(CSTB2022NSCQMSX0349);Science and Technology Research Program of Chongqing Municipal Education Commission(KJQN202313101)。

摘　　要：Two allyldimethylalkyl quaternary ammonium salt(AQAS)monomers,N,N-dimethylallylphenylpropylammonium bromide(AQAS1)and N,N-dimethylallylnonylammonium bromide(AQAS2),were synthesized and used to prepare modified polyacrylamide materials.Two new drag reducers were synthesized from acrylamide(AM),sodium acrylate(Na AA)and a cationic modified monomer(AQAS1 or AQAS2)via aqueous solution polymerization,and the copolymers were named P(AM/Na AA/AQAS1)and P(AM/Na AA/AQAS2),respectively.The structures of the drag reduction agents were confirmed by IR and1H NMR spectroscopies.The molecular weight(Mw)of P(AM/Na AA/AQAS1)was 1.79×10^(6)g/mol.When the copolymer concentration was 1000 mg/L and the flow rate was 45 L/min,in fresh water the highest drag reduction rate was 75.8%,in 10,000 mg/L Na Cl solution the drag reduction rate decreased to 72.9%.The molecular weight of P(AM/Na AA/AQAS2)was 3.17×10^(6)g/mol.When the copolymer concentration was500 mg/L and the flow rate was 45 L/min,the drag reduction rate reached 75.2%,and in 10,000 mg/L Na Cl solution the drag reduction rate was 73.3%,decreased by approximately 1.9%.The drag reduction rate for partially hydrolyzed polyacrylamide(HPAM)was also investigated,and the results showed that the drag reduction rates for 500 and 1000 mg/L HPAM solutions were merely 43.2%and 49.0%in brine,respectively.Compared with HPAM,both of the above copolymers presented better drag reduction capacities.

关 键 词：Shale gas Slick water Drag reducer Modified monomer COPOLYMERIZATION 

分 类 号：TE377[石油与天然气工程—油气田开发工程] TQ317[化学工程—高聚物工业]